persons



March 8, 1932.

| M. PERSONS PUMP Filed Apx il 4, 1927 3 Sheets-Sheet l law March 8, 1932. L. M. PERSONS 1,843,746

PUMP Filed April "4, 1927 5 Shets$heet 2 f q f lammfflfamma' March 8, 1932. L. M. PERSONS PUMP Filed April 4, 1927 3 Sheets-Sheet 5 Patented Mar. s,19 32 j i I 1 43 746 UNITEDISITATEVS PATENT oFFlcE-c'i- LAWRENCE M. rnnsoivs, or cH'IcAGo; ILLINOIS, ASSIGN'OB To 0001: ELECTRIC COMPANY, i

or oHIcAeo, ILLINOIS, A oonromi'rroiv on ILLINo s- Punt? 7 Application filed. April 4, 1927., Serial No. 180,669.:

My invention relates to an automatic confloat closes the motor circuit to start'operatrol for fluid supply-systems employed to tion' of the pump until the liquid reaches a pump liquid into a supply tank or receptacle predetermined high level. The float thenand is particularly directed to the automatic rises until this predetermined high leyel is,

53 control of a pumping apparatus which inreached and thereupon it opens the c1rcuit sures greater protection and safety. to stop .the pumping unit.

In order to apprise. those skilled in the art Considerable attention has been given tohow to construct and practice my invention, such an automatic control, because there is a I shall now describe a preferred embodiment possibility thatit will function to pump' the 1 thereof in connection with the accompanyentire contents from the storage tankinto ing drawings formingapart hereof. the building in the event a leak occurs in In the drawings: the line'extending from the pump to the Figure 1 is a diagrammatic view of a fluid burner, or other point of consumption. In

supply system embodying my invention, oil burning systems particularly this is ob-v 715 Fig. 2 is an enlarged vertical sectional jectionable, due to the possible .fire hazard 3 view of the pump; 7 I arising. when the basement floor is thus Fig. 3 is an enlarged detail sectional view flooded by I the liquid fuel. The Underof the control, a portion of the pump head Writers Laboratories, wh1ch approve devices 7 being illustrated in dotted lines; of this kind, have objected to an automatic 3 20 Fig. 4 is a sectional view taken on line control, when it is not provided with asafety 47-4 of Fig. 3 looking in the direction of the which would cut out the pump in the event a arrows; and Y .leak occurred.

Fig. 5 1s a detail viewiof the control ele- I contemplate embodying my inventionin ment.

' It will be observed that the preferred emmade to cut out the pump after a predeterbodiment of my invention comprises an. oil mined quantity of fuel'has been pumped from, burning system which is particularly em the reservesupply tank intothe building to ployed for domestic purposes, as for inthe burner. I v V stance, heating homes and other similar In the apparatus shown in the drawings,

"- buildings. It will be understood nevertheoil or liquid in the storage tank 5 is drawn less that my invention may be embodied in through a suction pipe 6 constitutinga sucany'type of automatic pump. Provision is any type of liquid fuel feeding system,.or in tion line by means of a pump A, and is any type of fluid system adapted for pumpdischargedinto a supply tank or other recepsupply tank or receptacle, or otherwise. to burner 10. Burner 10 may be of anyrde- Various types of automatic, pumps have sired type, although I have shown a motor 11 heretofore been provided embodying a confor driving a blower 12, which blower "feeds trol capable of automatically starting and the liquid fuel in an atomized conditionv to stopping the pump according to various a firepot 13.

operating conditions. Aitype of pump par- Pump A compris s, n electric motor .147

inga liquid from a source of supply into a tacle 7, from which receptacle the oil is fed ticularly employed in liquid fuel feeding provided with a worm 15 meshing with a systems, which issimple and expedient to worm gear 16 mounted on a shaft 17, havuse, comprises a small receptacle intowhich 'ingan eccentric connection 18 whichis adaptthe liquid is pumped. and from which it is edlto drive a piston 19 suitably embodied in i fed by gravity to the burner. To control a cylinder 20 connected to the base of motor V the automatic operation of this type of 14. Receptacle? may also be attached to this pump, a float mechanism is incorporated in motor base and is arranged to enclose the the receptacle to control the pumping unit pump cylinder 20. During the pulsations of 0 between certain liquid levels. If the liquid piston 19, the liquid fuel is drawn through falls below a predetermined low level, the suction pipe 6. into port 21 through a strainer 22 and into pump cylinder 20 through an inlet valve not shown herein, but more fully described in United States Letters Patent, No. 1,746,441, granted to me on February 11, 1930. In this patent I have also described the manner of discharging the fuel from the cylinder Z20 into receptacle iDuring the normal operation of pump A, the level of the liquid will fluctuate between'the high v1evel".A.iB, :and "the rlOW level "QC-Di. hen the liquidgreachesa low; level C:D,' the motor circuit is closed byfioat 25 dropping to close an electric switch 26 suitably connected in the motor circuit by the conductors 27. The pumping unit'wv'illcontinue-pump- .ing until theilevel reaches the high level .AeB. "Thereupon the float. rises to open .syvitch126. .llntheeventthatlthe delivery pipe 28 be- .tWeen pump A and burner;l leaks or is bro- 'ken, the abnormalrdischa rgeof liqui'dffrom receptacle 7 lowers thef'fioatand. allows con tinuous operation of the pumping unit .to pump .thefliquid from the reserve supply tank'fidntolthe'building. 1T0 prevent the building from being. flooded, any invention providesmeansffor automatically stopping .the pumpia ftenar predetermined quantity or" I'fuel' is ldrawn Ifrom. the reserve. supply tank pl lDZIPJA.

'lThis means comprises an automatic cutout ,unit ":30, which .mayibe. suitably attached .to thelhou'singof motor 14,.assho-wn in Figs. '53 and .4. 'The unit includes. a. housing '31en- ,.clo'singlaspeed reducing connection W B. beft veen the motoiidrive andia controlling/element C connected 'in the motor circuit. iShaftcllisimounted inhearingsiSZ and 33, zas' indicated" inFig.18,..and.is connected. by ..a-,suitable coupling.3.4 to.a shaftr35. having .a \VORHIBGSQCUIQC]..lJhGPGtO. {Suitable bear- I ings?'gziiand 38 are: mounted. on housing '31: to support a transversely arranged shaft v39, :on Wh-icha WOIIII; gear 40.is.fastene'd. 'Worm gear 40 is adaptefdtomesh With ivorm'36 to Qdrivethe; transversely arranged shaft 39. A .second-Worm41 is formed on shaft'39 to mesh with a second-wormgear TWormgear 42 is suitably securedto-a shaft4'3, journalled in suitable bearings '44 arid-45 supported by "housing '31. Another-Worm 4C iscarrie'd by .sha'ft 43 to mesh with anddrive a Worm gear '48 secured toisha-ftj49 mounted. in a 50 supported in one side of housing'31. 'lhe inner end of shaft 49' is tapered =at51 to; pro vide africtional engagement With controlling element (C. 'I'This element f is preferably formed o'finsulating material having an annular contact 55-. carried about its periphery. 6 1Conta'ct55 .does. not: extend about theventire periphery of contnolling element (3, but is cbrokenas. indicatedat 56. inrFig. 5. alhe gear attain adescribe'd l reduces theneed of rotaftionvof controlling eelement C, so? that i the latter will: rotate once during the pumping 'gerous because during such" of predetermined quantity of fluid by the pump.

Controlling element C is connected in circuit With the motor 14 by means of a contact 57 and a coil spring 58. Motor conductor 59 suitably connects to contact holder 60 at 61,

"and thecontact' 57' may be carried by the holder 60. The other motor conductor 62 is "fastened to a metallic annular member 63 car- 'l'lGLl byian. insulating. plate 64,1Whi'ch. insulating platemay.besuitablysecured to the housing, or otherwise. It is obvious that the cireuit. is completed through coil spring 58, which bears against plate 63 and the contact "55'carrie'd bycontrolling element C. After a ,predetermined quantity or" 1 liquid has been pumped, the. controlling element .0 will have rotated I, to the point .Where contact member 55 isbroken, so thatsthe contact 5?:drops onto. thesurface 560i the controlling element. This opens the motor circuitandv stops the .pump.

:It'isapparent that the pumping-unitis capable of. supplying .a V predetermined quan- .tityiof', liquid before it automatically. steps. This quantity may vary according to. therequirements of the installatiomibutl might .inenti-on that in oilburning systen1s,,-itis desirable. to. allow the pumping. unit to p uinp sixty (.60), gallons0 liquid fuelifronithe reserve supply tank to theburner before allowing thecontrollinm elementC to open the circuit. ltihas been ascertainedxthat sixty gallons is insufli'cienttocause a fire hazard in. the eventota leak intheidelivery pipe 28.

Another. advantageo-fi my. invention is that manual resetting of the pumpiisrre q-uired rafter.it..automatically stopsrin the manner justdescribed. This requires the oceupantot .thebuilding to: inspecttthe pump periodical- 1y,.although it is automatic in operation. Ob- .viously, he will be compelled to observe: the operating conditions ofmtherburner *andthe amount of oil. "remaining: in. the. bulk-supply .tank5. 'It prevents the user ot'the systenren- .tirely tooverlookthe heating unit and allow .the supply of liquid f-uehin reserve supply tank 5 to be exhausted. To; allow thesupply intankfi to be exhausted, requiresthe-systemtoi be. shut down for a number ofhours or until.suchtimecas the supplyimay be re- ,plenished,-'and, in: cold-Weather. thisis dantimes the. pip Lug the building is apt to freeze and burst.

The manual resetting mechanism comprises aplunger' 65 having a suitableknoh '66 .imountedat the end thereof. The innerend of plunger 65 threads into controlling elenientC, or. is. otherwise suitably fastened; to .permit. manual rotation in order. toe-bring a starting point of contact membert55ihito. en- .ggagement with :the fixed contact 57. The Efrictional engagement between sha tt-49iand controlling element C may bra-temporarily broken i by :pulling the knob 66 outwardly against the action of spring 58. During normal operation, however, spring 58 applies sulficient force to hold controlling element C in driving relation with the tapered end 51 of shaft 49. v

Any suitable speed reducing gearing may constitute the connection B between the rotor drive and controlling element C. I do not intend to be limited to any particular speed reduction or to the employment of speed reducing gearing as a connection between the motor drive and the controlling element. My invention primarily resides in theprovision of a controlling element having a plurality of positions which, during its movement, will maintain the pumping unit in operation, while in one of its positions, and which will automatically stop the pumping unit, when another position is reached.

Various modifications and alterations of the various parts and mechanisms described may be had without departing from the scope of the invention.

I claim 1. The combination with liquid feeding apparatus including a pump, a motor and a circuit for said motor, of a control for stopping said pump, after a predetermined operation, having means for opening said motor circuit, said means including a spring pressed rotating member, a drive between said member and said motor, a contact on said memberv for opening said motor circuit after a predetermined rotation of said member, and' means for disengaging said member from said drive to reset said contact to circuit closing'position.

2. The combination with liquid feeding apparatus including a pump, a motor and a circuit for said motor, of a control for stopping said pump, after a predetermined operation, having means for opening said motor circuit, said means including a rotating member,

a drive between said member and said motor,

acontact on said member for opening said motor circuit after a predetermined rotation of said member, and meansfor disengaging said member from said drive to reset said contact to circuit closing position.

3. The combination with liquid feeding apparatus including a cuit for said motor, of a control for said pump having means for opening said motor circuit after a predeterminedoperation of said pump including a relatively fixed contact and a rotating contact engaging said fixed contact during a portion of its rotation and disengaging thereafter to open said motor circuit, and means for resetting said rotating contact to close said motor circuit.

4. The combination with liquid feeding apparatus including a pump, a motor and a circuit for said motor, of a control for said pump having means for opening said motor circuit after a predetermined operation of said pump including a rotating clutch member in driving relation with said motor, a contact rotated by said member, a second contact engaging said rotating contact during a portion of its rotation, and means for tern porarily disengaging said rotating clutch member from,

motor. a V

5. The combination 'with liquid feeding apparatus including a pump, a motor and a circuit for said motor, of a control forsaid pump having means for opening said motor circuit after a predetermined operation of said pump including a rotating clutch member, a drive for said clutch member, spring means for urging said clutch member in operative relation with said drive, means for overcoming said spring means to permit disengagement of said clutch member, a contact carried by said clutch member, and a relatively fixed contact adapted to be engaged by said first contact duringa predetermined rotation of said clutch member.

In witness whereof, I have hereunto subscribed my name.

LAWRENCE M. PERSONS.

pump, amotor and a cirdriving relation with said 

